html *{
  margin: 0;
  padding: 0;
  font-family: "Helvetica Neue",Helvetica,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Arial,sans-serif;
}

a{
  text-decoration: none;
  color: #000;
  font-size: 14px;
}
.clearfix{
  display: inline-block;
}

.clearfix:after{
  display: block;
  content: ".";
  height: 0;
  line-height: 0;
  clear: both;
  visibility: hidden;
}
